include/asm-powerpc/bug.h

   1 #ifndef _ASM_POWERPC_BUG_H
   2 #define _ASM_POWERPC_BUG_H
   3 #ifdef __KERNEL__
   4
   5 #include <asm/asm-compat.h>
   6 /*
   7  * Define an illegal instr to trap on the bug.
   8  * We don't use 0 because that marks the end of a function
   9  * in the ELF ABI.  That's "Boo Boo" in case you wonder...
  10  */
  11 #define BUG_OPCODE .long 0x00b00b00  /* For asm */
  12 #define BUG_ILLEGAL_INSTR "0x00b00b00" /* For BUG macro */
  13
  14 #ifndef __ASSEMBLY__
  15
  16 struct bug_entry {
  17         unsigned long   bug_addr;
  18         long            line;
  19         const char      *file;
  20         const char      *function;
  21 };
  22
  23 struct bug_entry *find_bug(unsigned long bugaddr);
  24
  25 /*
  26  * If this bit is set in the line number it means that the trap
  27  * is for WARN_ON rather than BUG or BUG_ON.
  28  */
  29 #define BUG_WARNING_TRAP        0x1000000
  30
  31 #ifdef CONFIG_BUG
  32
  33 #define BUG() do {                                                       \
  34         __asm__ __volatile__(                                            \
  35                 "1:     twi 31,0,0\n"                                    \
  36                 ".section __bug_table,\"a\"\n"                           \
  37                 "\t"PPC_LONG"   1b,%0,%1,%2\n"                   \
  38                 ".previous"                                              \
  39                 : : "i" (__LINE__), "i" (__FILE__), "i" (__FUNCTION__)); \
  40 } while (0)
  41
  42 #define BUG_ON(x) do {                                          \
  43         __asm__ __volatile__(                                   \
  44                 "1:     "PPC_TLNEI"     %0,0\n"                 \
  45                 ".section __bug_table,\"a\"\n"                  \
  46                 "\t"PPC_LONG"   1b,%1,%2,%3\n"          \
  47                 ".previous"                                     \
  48                 : : "r" ((long)(x)), "i" (__LINE__),            \
  49                     "i" (__FILE__), "i" (__FUNCTION__));        \
  50 } while (0)
  51
  52 #define WARN_ON(x) do {                                         \
  53         __asm__ __volatile__(                                   \
  54                 "1:     "PPC_TLNEI"     %0,0\n"                 \
  55                 ".section __bug_table,\"a\"\n"                  \
  56                 "\t"PPC_LONG"   1b,%1,%2,%3\n"          \
  57                 ".previous"                                     \
  58                 : : "r" ((long)(x)),                            \
  59                     "i" (__LINE__ + BUG_WARNING_TRAP),          \
  60                     "i" (__FILE__), "i" (__FUNCTION__));        \
  61 } while (0)
  62
  63 #define HAVE_ARCH_BUG
  64 #define HAVE_ARCH_BUG_ON
  65 #define HAVE_ARCH_WARN_ON
  66 #endif /* CONFIG_BUG */
  67 #endif /* __ASSEMBLY __ */
  68
  69 #include <asm-generic/bug.h>
  70
  71 #endif /* __KERNEL__ */
  72 #endif /* _ASM_POWERPC_BUG_H */